If all possible results are equally likely, what is the probability that a spin of the spinner will land on an upper case letter or a consonant?
A. 0.7
B. 0.9
C. 0.5
D. 0.3
To find the probability of landing on an upper case letter or a consonant, we need to first determine the total number of upper case letters and consonants on the spinner.
Let's assume the spinner has 6 equal sections:
- 2 upper case letters: A, B
- 4 consonants: B, C, D, F
There is an overlap between the upper case letter B and the consonant B, so we need to count it only once when summing them up. Therefore, there are a total of 5 possible outcomes that are either upper case letters or consonants.
The probability of landing on an upper case letter or a consonant is the number of favorable outcomes (5) divided by the total number of possible outcomes (6), which is:
5/6 = 0.8333
Since this value is not one of the answer choices, the best option is the one that is closest to the calculated probability, which is A. 0.7.